全文获取类型
收费全文 | 5431篇 |
免费 | 385篇 |
国内免费 | 9篇 |
专业分类
耳鼻咽喉 | 60篇 |
儿科学 | 214篇 |
妇产科学 | 170篇 |
基础医学 | 675篇 |
口腔科学 | 75篇 |
临床医学 | 823篇 |
内科学 | 952篇 |
皮肤病学 | 136篇 |
神经病学 | 470篇 |
特种医学 | 123篇 |
外科学 | 589篇 |
综合类 | 36篇 |
一般理论 | 5篇 |
预防医学 | 517篇 |
眼科学 | 156篇 |
药学 | 398篇 |
1篇 | |
中国医学 | 23篇 |
肿瘤学 | 402篇 |
出版年
2024年 | 15篇 |
2023年 | 74篇 |
2022年 | 100篇 |
2021年 | 213篇 |
2020年 | 124篇 |
2019年 | 186篇 |
2018年 | 221篇 |
2017年 | 157篇 |
2016年 | 173篇 |
2015年 | 163篇 |
2014年 | 202篇 |
2013年 | 299篇 |
2012年 | 422篇 |
2011年 | 474篇 |
2010年 | 218篇 |
2009年 | 251篇 |
2008年 | 365篇 |
2007年 | 422篇 |
2006年 | 331篇 |
2005年 | 336篇 |
2004年 | 264篇 |
2003年 | 272篇 |
2002年 | 223篇 |
2001年 | 33篇 |
2000年 | 20篇 |
1999年 | 32篇 |
1998年 | 35篇 |
1997年 | 22篇 |
1996年 | 23篇 |
1995年 | 17篇 |
1994年 | 13篇 |
1993年 | 11篇 |
1992年 | 5篇 |
1991年 | 10篇 |
1990年 | 5篇 |
1989年 | 23篇 |
1988年 | 6篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1985年 | 5篇 |
1984年 | 10篇 |
1983年 | 4篇 |
1982年 | 7篇 |
1981年 | 5篇 |
1980年 | 7篇 |
1979年 | 4篇 |
1978年 | 2篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1968年 | 3篇 |
排序方式: 共有5825条查询结果,搜索用时 0 毫秒
71.
Natalia J. Szmacinski Ruth M. DeBar Tina M. Sidener David W. Sidener 《Journal of developmental and physical disabilities》2018,30(5):653-668
The effectiveness of an audio model faded by volume on manding for materials was evaluated within an interrupted behavior chain with two children with autism. Behavior chains were interrupted to contrive an establishing operation (EO) by providing broken items and were interspersed with abolishing operation (AO) trials. An auditory model to teach mands was faded systematically by volume. Using a multiple probe design across three preferred activities, it was found that both participants were manded for some items in the absence of an audio prompt after it was faded systematically. Following the introduction of a prompt delay, participants learned to mand across remaining targets. Across participants, manding generalized to a novel interruption form (i.e., in sight but out of reach materials), to novel materials, and were maintained. Goals, procedures, and outcomes of the intervention were rated socially valid by clinicians. 相似文献
72.
73.
74.
75.
76.
77.
Roy P Bonello L de Labriolle A Okabe T Pinto Slottow TL Steinberg DH Torguson R Smith K Xue Z Satler LF Kent KM Suddath WO Pichard AD Waksman R 《The American journal of cardiology》2008,102(3):292-297
Multiple studies comparing sirolimus-eluting stents (SES) and paclitaxel-eluting stents (PES) in patients with coronary artery disease have been performed. Despite these comparisons, it remains uncertain whether a differential in long-term efficacy and safety exists. Unselected patients treated exclusively with 1 drug-eluting stent type were enrolled in the Registry Experience at the Washington Hospital Center with Drug-Eluting Stents. There were 2,099 patients (3,766 lesions) treated with SES and 1,079 patients (1,850 lesions) treated with PES. Patients were followed at 30 days, 1 year, and 2 years for the clinical endpoints of death, myocardial infarction, target vessel revascularization, and definite and definite/probable stent thrombosis. Patients in the SES group had more dyslipidemia, history of congestive heart failure, and ostial lesions; patients treated with PES had more previous coronary artery bypass surgery, unstable angina, and type C lesions. At 2 years, unadjusted major adverse cardiac events (MACE) (22.6% vs 21.1%, p = 0.3) and target vessel revascularization (13.3% vs 11.2%, p = 0.1) were comparable. The incidence of definite stent thrombosis was higher in the SES group (1.8% vs 0.9%, p = 0.05) driven by early events. Similar results were seen after adjustment for baseline differences: MACE (hazard ratio 1.1, 95% confidence interval [CI] 0.9 to 1.3, p = 0.5), definite stent thrombosis (hazard ratio 2.3, 95% CI 1.0 to 5.2, p = 0.05), and target vessel revascularization (hazard ratio 1.1, 95% CI 0.9 to 1.4, p = 0.4). The incidence and rate of late stent thrombosis (>30 days) were similar (0.7% vs 0.5%, p = 0.4 and 0.24%/year, both groups, respectively). In conclusion, no major differential in long-term safety or efficacy was detected between SES and PES; both stent types were efficacious in reducing revascularization but were limited by a small continual increase in late stent thrombosis. 相似文献
78.
Steinberg DH Shah P Kinnaird T Pinto Slottow TL Roy PK Okabe T Bonello L de Labriolle A Smith KA Torguson R Xue Z Suddath WO Kent KM Satler LF Pichard AD Lindsay J Waksman R 《The American journal of cardiology》2008,102(2):160-164
For patients undergoing elective percutaneous coronary intervention (PCI), procedural anticoagulation with bivalirudin was previously shown to significantly reduce bleeding complications at the cost of a modest increase in ischemic events compared with unfractionated heparin (UFH) and glycoprotein IIb/IIIa inhibitors (GPIs). However, the excess bleeding in patients treated with UFH and GPIs may have been caused by excessively high UFH doses and increased activated clotting times. This study sought to determine the bleeding risk of targeted low-dose UFH with GPIs compared with bivalirudin in patients undergoing elective PCI. Of 1,205 patients undergoing elective PCI, 602 underwent PCI with adjunctive UFH and GPIs with the UFH dose targeted to an activated clotting time of approximately 250 seconds, and 603 patients matched for baseline characteristics underwent PCI with bivalirudin. Outcomes were analyzed for major bleeding (hematocrit decrease >15%, gastrointestinal bleed, or major hematoma) and 6-month major adverse cardiac events (death, myocardial infarction, and target-lesion revascularization). The maximum activated clotting time achieved was 261.7 +/- 61.6 seconds in the UFH/GPI group and 355.4 +/- 66.6 in the bivalirudin group (p <0.001). In-hospital major bleeding rates were similar between groups (1.8% UFH/GPI vs 1.7% bivalirudin; p = 0.83), as were transfusion requirements (1.2% UFH/GPI vs 0.5% bivalirudin; p = 0.61). The 6-month major adverse cardiac event rate was also similar between groups (9.5% UFH/GPI vs 9.0% bivalirudin; p = 0.81). In conclusion, there were no significant differences in major bleeding and 6-month major adverse cardiac events for patients undergoing elective PCI treated with targeted low-dose UFH and GPIs compared with those treated with bivalirudin. 相似文献
79.
80.
Basil Miles Schwartz David Dalal Robin Horst Sara Scoville Elizabeth Adams Dawn Beaulieu Dawn Slaughter James C. Higginbotham Tina Vaezi Michael Choksi Yash 《Digestive diseases and sciences》2022,67(2):639-645
Digestive Diseases and Sciences - While the pathogenesis of inflammatory bowel disease (IBD) is incompletely understood, disruption of epithelial integrity is suspected to play a prominent role in... 相似文献